(A+8)/7A+(B-9)/9B

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Solution for (A+8)/7A+(B-9)/9B equation: 


x in (-oo:+oo)

A*((A+8)/7)+B*((B-9)/9) = 0

(A*(A+8))/7+(B*(B-9))/9 = 0

(9*A*(A+8))/(7*9)+(7*B*(B-9))/(7*9) = 0

9*A*(A+8)+7*B*(B-9) = 0

9*A^2+72*A+7*B^2-63*B = 0

(9*A^2+72*A+7*B^2-63*B)/(7*9) = 0

(9*A^2+72*A+7*B^2-63*B)/(7*9) = 0 // * 7*9

9*A^2+72*A+7*B^2-63*B = 0

x belongs to the empty set

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